*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: #F0F4F8;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  overflow: hidden;
  font-family: 'Inter', sans-serif;
}

#game {
  display: block;
  touch-action: none;
  cursor: default;
}

.back-link {
  position: fixed;
  top: 12px;
  left: 12px;
  color: rgba(0,30,60,0.55);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  z-index: 10;
  transition: color 0.2s;
}

.back-link:hover { color: #001E3C; }